Opik

Gives Claude the ability to instrument your LLM agents with Opik tracing and observability. It handles both the decorator setup and the entrypoint marking needed for Local Runner integration, follows your existing config style instead of forcing new patterns, and knows the integrations for OpenAI, Anthropic, LangChain, and others. The thread grouping for multi-turn conversations is genuinely useful if you're building chat agents. One gotcha it handles well: the LiteLLM current_span_data dance that prevents orphaned traces when you mix manual tracking with callbacks. Includes prompt versioning and eval suite setup, though those are secondary to the core instrumentation work.